Formats

I need to know all the formacts , extencions and programs that i can use in unity 3d

ex img : jpg png tiff ??
ex 3d obj blend ma
how can speack me the others

Try the User Manual:
http://unity3d.com/support/documentation/Manual/Asset%20Workflow.html
http://unity3d.com/support/documentation/Manual/Asset%20Import%20and%20Creation.html